package com.fast.alden.admin.entity.vo.server;

import com.fast.alden.common.util.Arith;
import com.fast.alden.common.util.DateUtils;
import lombok.Data;

import java.io.Serializable;
import java.lang.management.ManagementFactory;
import java.util.Date;

/**
 * JVM相关信息
 */
@Data
public class Jvm implements Serializable {
    /**
     * 当前JVM占用的内存总数(M)
     */
    private double total;

    /**
     * JVM最大可用内存总数(M)
     */
    private double max;

    /**
     * JVM空闲内存(M)
     */
    private double free;

    /**
     * JDK版本
     */
    private String version;

    /**
     * JDK路径
     */
    private String home;

    public double getTotal() {
        return Arith.div(total, (1024 * 1024), 2);
    }

    public double getMax() {
        return Arith.div(max, (1024 * 1024), 2);
    }

    public double getFree() {
        return Arith.div(free, (1024 * 1024), 2);
    }

    public double getUsed() {
        return Arith.div(total - free, (1024 * 1024), 2);
    }

    public double getUsage() {
        return Arith.mul(Arith.div(total - free, total, 4), 100);
    }

    /**
     * 获取JDK名称
     */
    public String getName() {
        return ManagementFactory.getRuntimeMXBean().getVmName();
    }

    /**
     * JDK启动时间
     */
    public Date getStartTime() {
        return new Date(ManagementFactory.getRuntimeMXBean().getStartTime());
    }

    /**
     * JDK运行时间
     */
    public long[] getRunTime() {
        return DateUtils.timeDiff(new Date(), getStartTime());
    }

    /**
     * 运行参数
     */
    public String getInputArgs() {
        return ManagementFactory.getRuntimeMXBean().getInputArguments().toString();
    }
}
